Project hangs after update to 17.2.1

I know, you should never change a system during working on a project, but I did it.
The project, with some fusion and color effects, was created with 17.2.0.
It hangs as soon as I want to play a timeline in the 17.2.1 edit preview.
When I previously open another small project and then open the project in question it works fine.
Please find attached the system.nfo(.zip) and the Resolve-logs.zip.
Any help is much appreciated. TIA
The project, with some fusion and color effects, was created with 17.2.0.
It hangs as soon as I want to play a timeline in the 17.2.1 edit preview.
When I previously open another small project and then open the project in question it works fine.
Please find attached the system.nfo(.zip) and the Resolve-logs.zip.
Any help is much appreciated. TIA